Shrimp Cebiche with Golden Tamarillo

If you try just one tamarillo recipe in your life, make it this one from Maricel Presilla, author of a forthcoming book on the foods of Latin America, from which the following is adapted. She developed this “ultimate shrimp cocktail” from one she discovered in the Ecuadorian highlands and now serves in her enchanting restaurant, Zafra, in Hoboken, New Jersey. Tart, fruity yellow tamarillo puree accented with citrus, garlic, chilli, onion, and cilantro envelops shrimp for a cebiche (or sevic